Dear Fernando, You'll also want to make sure you're using an optimized blas/lapack for your architecture.
I'm guessing the ROCKS cluster kernel is better tuned for scientific computing and network performance than the generic Kubuntu kernel. Have you tried using a similar kernel to the one provided by ROCKS? I'm interested in your results--I've also tinkered a bit with Ubuntu, especially since the advanced intel compilers are available for free on it and not in OS X. ~A On 12/19/06, Berend van Wachem <berend at chalmers.se> wrote: > Hi Fernando, > > Have you tried configuring PETSc with the option > --with-debugging=0 > > That should generate optimized code. > > For using hypre, you can specify > --download-hypre=yes > > Good luck, > > Berend. > > > Dear All, > > > > I've found that, for my application, the PETSc that comes in Kubuntu Linux > > 64 is twice faster than the one we can get in the PETSc's site. I want to > > use Hypre in my application, but I don't know how to use Hypre with the > > already compiled PETSc library in Kubuntu. Can you give me some hints in > > this task? Or maybe tell what should be reason for this difference in > > performance.. maybe I need some flags in order to optimize PETSc downloaded > > from the site? > > > > Thank you. > > > > Fernando Campos > >
